Final answer:
Fluconazole is the drug effective against Candida albicans and is used to treat various systemic yeast infections with fewer side effects due to its selective toxicity.
Step-by-step explanation:
The drug that is effective against Candida albicans is Fluconazole. Fluconazole is part of the triazole family of antifungal drugs, which work by inhibiting the biosynthesis of ergosterol, a key component of fungal cell membranes. This drug can either be taken orally or administered intravenously and is used to treat various types of systemic yeast infections, such as oral thrush and cryptococcal meningitis. Fluconazole is known for its selective toxicity, which means it targets fungal cells more specifically and is therefore associated with fewer side effects compared to similar antifungal medications.